The expectation from the fits to the data from the individual TESS sector was that the fractional radii would be reasonably consistent, as they are well determined by the contact points during the eclipses [1]}, [2]}, but that the radiative parameters (\(J\) , \(u_{\rm A}\) , \(u_{\rm B}\) ) would change significantly with time. Such assertions require the availability of errorbars, so we ran 1000 Monte Carlo simulations [3]}, [4]} to measure the 1\(\sigma \)  uncertainties in the fitted parameters. We also experimented with further subdividing the data from each sector into two light curves, before and after the mid-sector pause for TESS to downlink data to Earth. The latter results are more informative so were adopted for the following analysis.
